Signal Construct
Definition: A signal construct refers to the method or structure used to generate, represent, or process an electrical signal in hardware design.
Common Types:
- Analog Signal: Continuous voltage/current waveform (e.g., sine wave from sensor).
- Digital Signal: Discrete levels (e.g., TTL: 0V for '0', 5V for '1').
- Differential Signaling: Uses two complementary signals (e.g., LVDS) for noise immunity.
- PWM (Pulse Width Modulation): Encodes analog level via pulse duty cycle.
Key Considerations:
- Impedance matching
- Signal integrity (rise/fall time, overshoot)
- Noise margin and EMI
- Transmission line effects at high frequency